.header{
    width: 100%;
    height: 60px;
    position: absolute;
    top: 0;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    div{
        cursor: pointer;
        line-height: 30px;
        &.left{
            margin-left: 30px;
        }
        &.right{
            margin-right: 30px;
        }
    }
}